Hello! I can understand your concern, all you would need to do is log in with the Samsung account used to sign up One UI 4 beta program again, you can withdraw the beta program. Here is a resource you can use to find additional FAQs for the beta: https://developer.samsung.com/one-ui-beta#:~:text=To%20remove%20the%20beta%20software,data%20generated%20during%20beta%20testing.
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